<template>
  <div>
     <button @click="fn(3000)">发工资啦,我的工资是3000</button><br/><br/>
        <button @click="fn(-2800)">给喜欢的女主播刷了火箭-2800</button><br/><br/>
        <button @click="fn(10000)">送外卖赚了10000</button><br/><br/>
        <button @click="fn(-18000)">给暗恋的女生买了爱马仕-18000</button><br/><br/>
        <button @click="fn(8000)">晚上去做代驾赚了8000</button><br/><br/>
        <button @click="fn(-100)">买泡面100</button><br/><br/>
        <button @click="fn(-50)">买挂逼水50</button><br/><br/>
            
        <p>我这个月还有{{num}}元</p>
   </div>
</template>
 
<script>
export default {

  data() {
    return {
      num:1
    };
  },

  methods: {
    fn(num){
     this.num +=num
    }
  }
};
</script>

<style scoped>
     
</style>